JLG 660SJ Service Manual - Manual (Page 186)

SECTION 4 - BOOM & PLATFORM
4-14 – JLG Lift – 3121202
20. Align the cylinder with the slots at aft end of mid
boom section, then secure cylinder with mounting
hardware.
21. Align holes in aft end of the fly boom section with
holes in wire rope mounting block, then secure with
mounting hardware.
22. Align holes in aft end of the mid boom section with
holes in wire rope mounting block, then secure with
mounting hardware.
NOTE: Boom wire ropes must be torqued after installation of
the boom assembly.
23. Align holes in rod end of the telescope cylinder with
holes in push bar. Install push bar pin and secure
with mounting hardware.
23. Install the hydraulic lines and electrical cables, and
the harnessing powertrack components as follows:
a. Align holes in powertrack rail with attachment
holes in side of the base boom section. Secure
the rail with mounting hardware.
b. Install powertrack to rail with mounting hard-
ware.
c. Attach push tube bracket to the side of the mid
boom section with mounting hardware.
NOTE: Do not over tighten attach bolt on push tube bracket.
It should pivot freely.
d. Install slide block and wear pads to the pow-
ertrack rail with mounting hardware.
e. Install powertrack to push tube with mounting
hardware.
f. Carefully feed the hoses and electrical cables
through the aft end of the powertrack rail, pow-
ertrack and push tube.
g. Ensure all hoses and cables are properly routed
through the powertrack rail, powertrack and
push tube. Tighten or install all clamping or
securing apparatus to the hoses or cables, as
necessary.
h. Install powertrack cover and push tube rods with
mounting hardware.
Installation
1. Using a suitable lifting device, position boom
assembly on turntable so that the pivot holes in both
boom and turntable are aligned.
2. Install boom pivot pin, ensuring that location of hole
in pin is aligned with attach point on turntable.
3. If necessary, gently tap pin into position with soft
headed mallet. Secure pin mounting hardware.
4. Align push bar pivot hole with pivot holes in turnta-
ble. Install push bar pivot pin, ensuring that location
of hole in pin is aligned with attach point on turnta-
ble.
5. If necessary, gently tap pin into position with soft
headed mallet. Secure pin mounting hardware.
6. Connect all wiring to the ground control box.
7. Connect all hydraulic lines running along side of
boom assembly.
Figure 4-17. Reassembly of Components - Boom
Powertrack Assembly